﻿define([
   "dojo/_base/declare", "esri/layers/TiledMapServiceLayer", "esri/geometry/Extent", "esri/SpatialReference", "esri/layers/TileInfo"
   ],function(declare, TiledMapServiceLayer, Extent, SpatialReference, TileInfo){
    return declare(TiledMapServiceLayer, {
	 constructor: function() {
	        	this.spatialReference = new SpatialReference({ wkid:4326 });
	            this.initialExtent = (this.fullExtent = new Extent(-180.0, -90.0, 180.0, 90.0, this.spatialReference));
	   
	            this.tileInfo = new TileInfo({
	              "rows" : 256,
	              "cols" : 256,
	             "compressionQuality" : 0,
	             "origin" : {
	               "x" : -180,
	               "y" : 90
	             },
	             "spatialReference" : {
	               "wkid" : 4326
	             },
	             "lods" : [
	               {"level" : 1, "resolution" : 0.703125, "scale" : 295497593.05875003},
	               {"level" : 2, "resolution" : 0.3515625, "scale" : 147748796.52937502},
	               {"level" : 3, "resolution" : 0.17578125, "scale" : 73874398.264687508},
	               {"level" : 4, "resolution" : 0.087890625, "scale" : 36937199.132343754},
	               {"level" : 5, "resolution" : 0.0439453125, "scale" : 18468599.566171877},
	               {"level" : 6, "resolution" : 0.02197265625, "scale" : 9234299.7830859385},
	               {"level" : 7, "resolution" : 0.010986328125, "scale" : 4617149.8915429693},
	               {"level" : 8, "resolution" : 0.0054931640625, "scale" : 2308574.9457714846},
	               {"level" : 9, "resolution" : 0.00274658203125, "scale" : 1154287.4728857423},
	               {"level" : 10, "resolution" : 0.001373291015625, "scale" : 577143.73644287116},
	               {"level" : 11, "resolution" : 0.0006866455078125, "scale" : 288571.86822143558},
	               {"level" : 12, "resolution" : 0.00034332275390625, "scale" : 144285.93411071779},
	               {"level" : 13, "resolution" : 0.000171661376953125, "scale" : 72142.967055358895},
	               {"level" : 14, "resolution" : 8.58306884765625e-005, "scale" : 36071.483527679447},
	               {"level" : 15, "resolution" : 4.291534423828125e-005, "scale" : 18035.741763839724},
	               {"level" : 16, "resolution" : 2.1457672119140625e-005, "scale" : 9017.8708819198619},
	               {"level" : 17, "resolution" : 1.0728836059570313e-005, "scale" : 4508.9354409599309},
	               {"level" : 18, "resolution" : 5.3644180297851563e-006, "scale" : 2254.4677204799655}
	             ]
	          });
	           this.loaded = true;
	           this.onLoad(this);
	         },
	         getTileUrl: function(level, row, col) {
	             return "http://t" + row%8 + ".tianditu.cn/cva_c/wmts?SERVICE=WMTS&REQUEST=GetTile&VERSION=1.0.0&LAYER=cva&STYLE=default&TILEMATRIXSET=c&TILEMATRIX="+level+"&TILEROW="+row+"&TILECOL="+col+"&FORMAT=tiles";
	    
	           }
	  }); 
  });
 